Generations should have shrank in size after the millenial generation, due to how rapidly society (and people) changed around the turn of the millennium
Like for millenials, someone born in 1981 at least shares some similarities with someone born in 1996. Both grew up with the internet (at different life stages, but still) and have memories of pre-internet, pre-smart phones, 9/11, video stores, big cultural events etc
But for gen Z'ers, someone born in 1997 has absolutely nothing in common with someone born in 2012. And they still won't have anything in common when they're both older
A 1997 baby is a normal, well-adjusted adult who didn't even deal with covid during their own education. A 2012 baby missed in-person first and second grade to covid, and are full on skibidi toilet brainrot. You could and should honestly split gen Z into two different generations